Isomat boom main sail cover (top zippered)

[keelsidedown]

I'm looking for a main sail cover for an isomat boom (single slot that runs the length of the boom).

I'm curious to know how these are attached to the boom since the slot for the sail foot doesn't have much extra clearance. I'm looking for a top zippered stack pack, rather than a drape over bottom zippered affair.

Anyone know what I'm talking about?

I can provide pictures if necessary.


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